Reversing-valve.



No. 856,652. PATBNTED JUNE 11, 19o7. P. H. MURPHY.

REVBRSING VALVE.

APPLICATION FILED DEG. 8,1906.

Inve mm1 UNITED STATES.

PETER II. MURPHY, OF ST. LOUIS, MISSOURI.

REVERSING-VALVE.

Specification of Letters Patent.

Patented June 11, 1907.

Original application filed December 11,1905, Serial No. 291,248. Divided and this application filed December 8,1906- Serial No. 346,931.

To UJI V107107.17l 'it 'Inl/ny concern.-

Be it known that I, PETER. H. MURPHY, a citizen of the United States, and a resident of the city 'of St. Louis and State ol" Missouri, have invented a new and useful Improvement in. Reversing-Valves, oi which the following is a specilication.

My invention relates to reversing valves, and has for its principal objects to produce a novel reversing valve for origines, and which is especially applicable to pneumatic drills.

The invention consists in the parts and in Athe arrangements and combinations of parts hereinafter described and claimed.

In the accompanying drawings which form part of this specification and wherein like symbols refer to like parts wherever they occur, Figure 1 is a view, partlyT in section, showing the reversing valve in position on a pneumatic drill casing 5 Fig. 2 is a section on line 2-2 of Fig. l 5 Fig. 3 is an end view of the reversing valve lug on the casing, Fig. 4 is a section on the line 4 4 of Fi-g. 1; Figs. 5, 6 and 7 are detail views of the reversing valve; and, Figs. 8 and 9 are detail views of the reversing valve sleeve.

This application is a division of another application for patent, for pneumatic drills, filed by me on December 11, 1905, Serial No. 291,248, to which reference is hereby made for more particular description of engine to which the improvements herein described specially relate.

In the accompanying drawings is represented a portion of a casing 1. containing ducts 2 and 3 which lead to the engine valves (not shown). In a reversing-valve lug 4 on the outside of one wall of the casing 1 the ducts 2 and 3 start. It is to be understood that these ducts are so connected with the engine valves that said ducts can be made to alternately become supply and exhaust passages, and also that the engine valves are so arranged that the direction in which the engine operates is according to which is the supply and which is the exhaust duct.

The reversing valve lug has a smoothly finished outer plane surface into which both ducts open at diametrically opposite points. At one side and between the two ports thus formed, is a port of an exhaust duct 5 finding its outlet at the side of the lug. This exhaust port is elongated for a purpose that will presently appear. At its center the lug has a bearing 6. The lug is externally screwthreaded and upon it fits a reversing valve housing 7. Vithin this housing is arranged a reversing valve 8 provided with a centrally located pin 9 arranged to lit in the bearing 6 in the lug.

The reversing' valve is provided with` two ducts 10 and 11 passing entirely through it and an elongated duct 12 which is merely recessed. A sleeve 13'fits inside of the housing and extends longitudinally beyond it. It carries a pin or pins 14 which engage a hole or holes 15 in the upper iace of the valve. A hose coupling 16 screws on the end of the sleeve 13 and serves as a handle by means of which the sleeve and reversing valve may be turned.

To properly locate the valve in any desired adjustment the Afollowing means are used: In the valve housing an externally screwthreaded sleeve 17 is mounted. Inside of said sleeve is a spring 18 'which presses a ball 19 inwardly in contact with the face or' the reversing' valve. On the face ot the reversing valve is an indentation 20 which the ball will drop into and thereby yieldingly hold the reversing valve in its middle or ine'llective position. On the opposite sides of said indentation are stop pins 21 and 22 which will strike the ball and stop the reversing valve in its extreme ositions.

The air admitted through the hose coupling 16 into the sleeve 13 holds the valve closely to its seat and may be directed by the same into either of the ducts 2 or 3. When in one extreme )osition the duct 1() is in communication with the air duct 3 while the duet 12 connects the air duct 2 and exhaust duct 5. Then in the other extreme position, the duct 1 1 is in communication with the air duct and the duct 12 connects the duct 3 and the exhaust duct 5. Thus, by manipulation of the reversingl valve the direction of rotation of the tool may be reversed.

Obviously my device is capable ol considerable modification within the scope of my invention, and therefore, I do not wish to be limited to the specificconstruction shown and described.

i/Vhat I claim as my invention and desire to secure by Letters Patent is:

1. A reversing' valve comprising` a cylindrical lug externally threaded and provided with two supply ducts and an exhaust duct opening through its face, a cylindrical housing externally threaded to cooperate with IOS said lug and having a tubular projection, a valve rotatably mounted inside of said housing and having ducts arranged to be put in connection with said first mentioned ducts, respectively, and having also a connecting duct arranged to connect either of said firstrnentioned ducts with said exhaust duct, and a tubular handle whose bore constitutes a portion of the supply duct, and means for securing said valve to said handle to be manipulated thereby.

2. A reversing valve comprising a cylindrical lug externally threaded and provided with two supply ducts and an exhaust duct opening through its face, a cylindrical housing externally threaded to coperate with said lug and having a tubular projection, a valve rotatably mounted inside of said housing and having ducts arranged to be put in connection with said first mentioned ducts, respectively, and having also a connecting duct arranged to connect either of said first mentioned ducts with said exhaust duct, a hollow'sleeve rotatably mounted in said housing and connected to said valve to actuate it, a hollow handle whose bore constitutes a portion of the supply duct, means for connecting said handle to said sleeve to actuate the'valve, and cooperating stops mounted on said housing and said valve, respectively, to limit the rotation of said valve.

3. A reversing valve comprising a cylindrical lug externally threaded and provided with two supply ducts and an exhaust duct opening through its face, a cylindrical housing externally threaded to coperate with said lug and having a tubular projection, a valve rotatably mounted inside of said housing and having ducts arranged to be put in connection with said first mentioned ducts, respectively, and having also a connecting duct arranged to connect either of said rst mentioned ducts with said exhaust duct, a ball yieldingly mounted in said housing and bearing on the face of said valve, said valve being provided with a depression arranged to receive said ball to yieldingly hold the valve against rotation.

In testimony whereof l have signed my name to this specification in the presence of two subscribing witnesses this 5th day of December, 1906, at St. Louis, Missouri.

PETER H. MURPHY. lllitnesses:

FRANK L. LAMKEY, JAMES A. CARR. 

